* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download AMHS Connectivity - Airports Authority of India
Server Message Block wikipedia , lookup
SIP extensions for the IP Multimedia Subsystem wikipedia , lookup
Point-to-Point Protocol over Ethernet wikipedia , lookup
TCP congestion control wikipedia , lookup
Computer network wikipedia , lookup
Extensible Authentication Protocol wikipedia , lookup
Remote Desktop Services wikipedia , lookup
Multiprotocol Label Switching wikipedia , lookup
Deep packet inspection wikipedia , lookup
Cracking of wireless networks wikipedia , lookup
Wake-on-LAN wikipedia , lookup
Zero-configuration networking wikipedia , lookup
Communication protocol wikipedia , lookup
UniPro protocol stack wikipedia , lookup
Recursive InterNetwork Architecture (RINA) wikipedia , lookup
COMSOFT is making the link AMHS Interoperability AMHS Implementation Workshop Chennai, India 15–16 December 2008 COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 1 Overview Mixed environment ATN protocol variants AMHS interoperability Impact and limitations COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 2 Mixed Environment Transition period AMHS AFTN AFTN AMHS AFTN + AMHS • ATN/OSI • ATN/IPS ATN/ISP ATN/OSI AMHS AFTN + AMHS AMHS AFTN COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 3 End User Connectivity AFTN to AFTN AFTN AFTN AFTN AMHS AFTN AFTN to AMHS and vice versa AFTN AFTN AMHS AMHS AMHS to AMHS AMHS AMHS COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 4 AMHS ATN Protocol Variants AMHS over ATN/OSI • Initial approach as per ICAO Doc 9705 • Adopted early by ASIA/PAC Regions AMHS over ATN/IPS • Introduced to use widespread IP technology • Optional in ASIA/PAC Regions AMHS over ATN/IPS AMHS over ATN/OSI ? COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 5 AMHS Protocol Stack AMHS Application Application • based on OSI 7 layers AMHS upper layers • Layers 5 - 7 • Uniform • Independent of networks AMHS lower layers • Layers 1 - 4 • ATN/OSI or ATN/IPS 7 Application Layer 6 Presentation Layer 5 Session Layer 4 Transport Layer 3 Network Layer 2 Data Link Layer 1 Physical Layer COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 6 AMHS over ATN/OSI Transport Protocol Class 4 Connectionless Network Protocol Various sub-networks • LAN: LLC1, ... • WAN: X.25, ... ATN Router Transport Layer 4 Transport Protocol Class 4 (TP4) Network Layer 3 Connectionless Network Protocol (CLNP) LLC1 2 • Unique to aviation due to extensions • Designed to support G/G and A/G • Open for integration of other sub-networks CSMA/CD LAN COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 7 ... ... X.25 ... LAPB WAN AMHS over ATN/OSI Example for a pure ATN/OSI environment AMHS Applications operate over LAN (e.g. TP4 / CLNP / LLC1) ATN Router interconnect using WAN (e.g. CLNP over X.25) COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 8 AMHS over ATN/IPS Transport Protocol Class 0 Transmission Control Protocol Internet Protocol 4 • IPv4 (RFC 1006) • IPv6 (RFC 2126) 3 Standard IP Router 2 Transport Layer Transport Protocol Class 0 (TP0) RFC 1006 / RFC 2126 Transmission Control Protocol (TCP) Internet Protocol (IP) CSMA/CD • Interoperability IPv4/v6 by Network Address Translation and Protocol Translation (NAT/PT) COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 9 LAN AMHS over ATN/IPS Example for a pure ATN/IPS environment AMHS Applications operate over LAN (e.g. TCP/IP / Ethernet) IP Router interconnect using WAN (e.g. TCP/IP over Frame Relay) COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 10 Coexistance of ATN/OSI and ATN/IPS How to connect ? Appl. ATS Message Server ATS Message Server Appl. Pres. Pres. Session Session TP4 TP0 CLNP TCP/IP ? ... ATN Router ... IP Router AMHS ATN/OSI AMHS ATN/IPS Common Protocol Stack required Protocol stacks are not compatible! COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 11 AMHS using Dual Stack Router Example for a dual stack router ATS Message Server Application ATS Message Server Appl. Presentation Pres. Session Session TP4 TP0 TP0 CLNP TCP/IP ... TCP/IP Dual Stack Router ... ... IP Router AMHS ATN/OSI AMHS ATN/IPS AMHS End Systems operate over LAN ATN Router implements both stacks and a Transport Bridge COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 12 AMHS using Dual Stack Application Example for a dual stack ATS Message Server ATS Message Server Application ATS Message Server Appl. Presentation Pres. Session Session TP4 TP0 TP0 TCP/IP CLNP TCP/IP ... ... ... ATN Router AMHS ATN/OSI IP Router IP Router AMHS ATN/IPS AMHS Application implements both stacks ATN Router interconnects using ATN/OSI IP Router interconnects using ATN/IPS COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 13 AFTN/AMHS Gateway Interconnects AMHS with AFTN • Seamless transition from AFTN to AMHS • AFTN – AFTN over AMHS Bi-directional message exchange • ATS Messages • Conversion of addresses and contents • Limitations from AMHS to AFTN Transparent to end users End users can migrate any time COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 14 AFTN/AMHS Gateway AFTN – AMHS • AFTN/AMHS Gateway on AFTN side AFTN – AFTN AMHS • AFTN/AMHS Gateway ATS Message Server on both sides AFTN/AMHS Gateway AFTN AFTN/AMHS Gateway AFTN AMHS COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 15 Interoperability Tests Ensure interoperability of products from different suppliers ASIA/PAC AMHS Manual • Conformance (Annex B) • Interoperability (Annex E) • Per-Operational (Annex F) ATN Routers and AMHS Applications are interoperable • Trials • Interoperability tests • Daily operation COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 16 Plans for ASIA/PAC Regions Strategy for ATN/IPS in ASIA/PAC is under consideration Backbone systems implement dual stack solutions • ATN/OSI • ATN/IPS Non-backbone system may implement ATN/OSI or ATN/IPS Long-term objective: ATN/IPS COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 17 Summary Coexistance of ATN/OSI and ATN/IPS • Dual stack routers or applications Integration of AFTN users • AFTN/AMHS Gateway Transparency for end users • AFTN • AMHS Interoperability Tests • ASIA/PAC: AMHS Manual • EUR: ECG initiative and AMHS Manual COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 18 Thank you ! [email protected] COMSOFT GmbH | AMHS Interoperability | December 2008 | Page 19